Hale to charles g



(No Model.)

B. F. SMITH.

DRIVEN WELL STRAINER. v No; 560,441. Patented May 19, 1896.

WILQEIEEE'S! I JEQIUI ANDREW B.GRAHAM PIIUTO'UTNQWASHINGTDNJ UNITED STATES PATENT OFFICE.

BENJAMIN F. SMITH, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR OF ONE HALF TO CHARLES G. SMITH, OF SAME PLACE.

DRIVEN-'WELL STRAINER.

SPECIFICATION forming part of Letters Patent No. 560,441, dated May 19, 1896.

I Application filed November 12, 1895. Serial No. 568,660. (No model.)

To all whom, it may concern:

Be it known that I, BENJAMIN F. SMITH, a citizen of the United States, and a resident of Somerville, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Driven -We1l Strainers,of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to improvements in driven-well strainers such as are used in Artesian 0r driven wells; and it is carried out as follows, reference being had to the accompanying drawings, wherein Figure 1 represents a side elevation of the invention, showing a portion of the surrounding wire-gauze or outer strainer as removed. Fig. 2 represents a central longitudinal section of the invention. Fig. 3 represents a cross-section on the line 3 3 shown in Fig. 2. Fig. 4 represents a cross-section on the line 4 4 shown in Fig. 2.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

A represents the strainer-pipe, which is made of wrought-iron and has a screw-thread B at its upper end for connecting it to the lower section of the well-pipe. The strainerpipe is also provided at its lower end with a screw-thread C, by means of which it is attached to the point D, as is common in devices of this kind.

E E are perforations through the side of the pipe A, as shown.

On the outside of the pipe I provide an outwardly-projecting reinforcing-spiral K, having a spiral groove F, in which is spirally laid a metal wire G, which is firmly secured in position on said pipe by means of a suitable solder or alloy. The grooved spiral projection K provides a means of securing the wire G without impairing in the slightest the strength of the pipe, said spiral, in fact, serving as a reinforce or means of additional strength for the pipe, and it provides also a spiral recess L, which serves to provide a free passage in to the pipe Athrough the perforations E therein.

H represents the outer surrounding strainer, which may be made of wire-gauze, netting, or perforated sheet metal, as is common in devices of this kind.

The'perforations E are arranged in the space between the winding of the spiral wire G, as shown, by which 'a more free and unobstructed passage is established for the water as it passes from the surrounding earth through the outer strainer H into the space between the latter and the perforated pipe A, and through the perforations E into and up through the pipe A, thus producing a wellstrainer of great capacity in proportion to its size, and one that is not readily clogged up by the earthy matter that may flow through it during the water delivery.-

What I wish to secure by Letters Patent and claim is In a well-strainer, the combination of a pipe provided with an outwardly-projecting reinforcing-spiral and a recess between the winding of said spiral from which perforations lead to the interior of the pipe, a wire G seated in the groove of said projecting spiral, and an outer strainer H, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 26th day of October, A. D. 1895.

BENJAMIN F. SMITH. WVitnesses:

ALBAN ANDREN, LUoY B. BUswELL. 

